So it's been just over a week now with my refurbished Rev B and I'm noticing the casing is creaky along the edges/seams. Everything is tight and it's not the display. Is this a Rev B thing? My Rev A was super solid and didn't make any noises. I know the internals of the Rev A vs. Rev B were drastically changed and I wonder if that has anything to do with it. It's not bad, I just noticed it and was curious... maybe it's a refurb thing?